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Be it known that I, DAVID B. TIFFANY, oi' Xenia, in the Stute of Ohio,have invented certain new and useful Improvements` in Jewelling-Tools;V,and I hereby declare that the yfollowing is a true, full, and exactpurposes specified.

description of the same, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon. ,y l l iFigure 1 in the annexed drawings, which make a part of thisspecification, represents a side view of' my jewellers tool.'v Y .p l

Figure 2' represents a. plan view of an arm attached to the tool orvise.

Figure SVdeS'igna't-es `aplan view'ota second arm fastened to theopposite side of the vise.

The letter A represents a small hand-vise. To onejaw of the vise A,which is iiat at top, is secured the a-i-in b, by a screw furnished withthenut g. The ari'n Zi being slotted, as seen in iig. 2, can be raisedor lowered at pleasure. A cylindricalelbow, e, which forms a part of armb, is formed at right angles with!) and with the piane at the top of thejaw to which L is attached. The elbowc has a circular hole through it,which is intended to receive the tools used by the operator. drepresents another slotted arm placed on the opposite jaw to b, andsecured in position by the screw thatI holds the two jaws ci' the visetogether. The arm d, lit will be seen, is made adjustable by means ofthe slot above mentioned and use of the nut s. The upper `end of arm dis perforated to receive the set-screw a. E designates a circular screwtap, serrated at its periphery, and placed between the vise and the armCZ. The object ofthe tap 7L is to screw the jaws of the vise together.'lhe letters 'm and n. represent two prolongations of the jaws of thevise, their intention being, to hold rings the more firmly when they areoperated on. i

The mode ofoperating my invention is as follows, viz: The watch-plate,or object to be jewelled, is first secured in the vise by means of thecircular screw e, with the part to be jewclled above the face of thevise. Then adjust the arm d by means of the nut s, and bring theset-screw a against the plate that is to be worked on, so aste supportit and keep it rmly in its place. Now place the cutting-shaft or guidethrough the perforation in c; adjust its point to the centre of the holeto be jewelled. Whilst the point of the shaft is thus against the plate,secure the arm b by means of nut g. Next withdraw the centre-shaft, andput in itsl place a shaft-'with a i'lat, sharp end, by revolving whichthe socket to receive the jewel is formed. The dat end shaft is nowwithdrawn, and-a cutter with'a V-shaped en d inserted, by the revolvingot' which a bezel or ange is formed, and this ange, being pressed aroundthe jewel, holds it firmly in position. j

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

1. An adjustable arm, through which the cutters work, secured to eitherside ot' the vise, substantially as and for the purposes set forth anddescribed. i

2. An adjustable arm, ci, provided with a. set-screw, a, and secured tothe' side of the vise opposite to the former, substantially as and forthe purposes set forth; y

A3.4 The combination of thetwo adjustable arms with circular tap e andnut g, operating as and for the DAVID B.v TIFFANY.

Witnesses:

'1. A. SEXToN,

S. D.Fnosr.

